Click on the links below for a pdf file of the document.
The sulfur isotopic composition of Neoroterozoic seawater sulfate: Implicaations for a snowball Earth?, (2002), Hurtgen, Arthur, Suits and Kaufmann, Earth and Planetary Science letters, 203, p. 413-429. (PDF-1.1Mb)
Phosphorite formation in modern sediments and its implications for phosphogenesis in the NeoProterozoic. First Annual Meeting of the NASA Astrobiology Institute, N.S. Suits and M.A. Arthur, (1999), (PDF-0.1Mb)